1. **State the problem:** Subtract the sum of 418 and 246 from 1000. 2. **Write the expression:** We need to find $$1000 - (418 + 246)$$. 3. **Calculate the sum inside the parentheses:** $$418 + 246 = 664$$ 4. **Substitute back into the expression:** $$1000 - 664$$ 5. **Perform the subtraction:** $$1000 - 664 = 336$$ 6. **Answer:** The result is 336. Therefore, the correct choice is b. 336.